Symptom Troubleshooting Using the Immobilizer Indicator Lighting Pattern
The pattern of the immobilizer indicator light can help troubleshooting the condition of the immobilizer system. Following are descriptions of the five possible patterns:
Normal operation (Lighting pattern 1)
When the ignition switch is turned to ON (II) and the immobilizer code is identified, the immobilizer indicator comes on for 2 seconds, then goes off.
The immobilizer indicator blinks five times when the ignition switch is turned to LOCK (0).
+B line open (Lighting pattern 2)
When the ignition switch is turned to ON (II) and the immobilizer code is identified, the immobilizer indicator comes on for 2 seconds, then goes off.
The immobilizer indicator goes off when the ignition switch is turned to LOCK (0).
Immobilizer code is not identified (Lighting pattern 3)
When the ignition switch is turned to ON (II) but the immobilizer code is not identified, the immobilizer indicator comes on for 2 seconds, then blinks. The state of the immobilizer key registration and the S-NET line can be checked by doing a SYSTEM CHECK and a STATUS LOG CHECK with the HDS (see SYSTEM CHECK ). The immobilizer indicator goes off when the ignition switch is turned to LOCK (0).
Immobilizer indicator does not come on (Lighting pattern 4)
If the immobilizer indicator does not come on when the ignition switch is turned to ON (II), check the following items:
- Check that there is battery voltage on the +B line.
- Check that the LG3 line is grounded through the PCM.
- Check for continuity between the immobilizer control unit-receiver and the gauge control module (IMOARM line).
- Gauge control module
Immobilizer indicator does not go off (Lighting pattern 5)
If the immobilizer indicator does not go off after the ignition switch is turned to ON (II), check for a short to ground in the immobilizer circuit between the gauge module and the immobilizer control unit-receiver (IMOARM line).